# Sum of product and sum

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Start with the numbers from 1 to 100. Take any two and replace them by the sum of their product and sum. Repeat until one number remains. What number is it?

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Start with the numbers from 1 to 100. Take any two and replace them by the sum of their product and sum. Repeat until one number remains. What number is it?

- This page was last edited on 8 September 2011, at 17:24.